Polish rod adjuster device



May 19, 1959 c. E MURRAY 9 POLISH ROD ADJUSTER DEVICE Filed Nov. 14, 1956 CLYDE MURRAY INVENTOR.

BY .QM z? flmz/ ATTORNEY United States Patent POLISH ROD ADJUSTER DEVICE Clyde E. Murray, Graham, Tex.

Application November 14, 1956, Serial No. 622,201

1 Claim. (Cl. 74-408) This invention relates to oil well pumping equipment, and it has particular reference to an adjusting device for sucker or polish rods, and its principal object resides in the provision of a novel assembly of parts by which the polish rod can be raised or lowered in the well tubing, and with respect to the walking beam, whereby more efiicient fluid flow can be accomplished when the foot valve of the working barrel becomes sanded or gas locked and to prevent the necessity of pulling the tubing and pumping equipment for inspection and repair.

An object of the invention is that of providing a simple mechanism by which the .storke of the pump equipment can be controlled so that a greater volume of well fluid can be produced with a minimum of delays due to shut-downs for repairs and eliminating the costs attendant thereupon.

It is a further object of the invention to provide a device which can be economically produced and installed and simple in operation, ailording means by which unskilled attendants may make the installation and operate the device to insure proper production at all times.

Broadly, the invention contemplates the provision of a threaded adjusting sleeve which embraces the rod and supported on the rod casting so that adjustments can be accomplished with little eifort well above the stuffing box and clear of the mulehead on the walking beam.

While the foregoing objects are paramount, other and lesser objects will become mainfest as the description proceeds, taken in connection with the appended drawings wherein:

Figure 1 is a vertical sectional view of the invention shown applied to a polish rod and rod casting, the latter also being shown in vertical section.

Figure 2 is a fragmentary perspective illustration of a pump jack showing the invention and its relation to the walking beam and mulehead.

Figure 3 is a transverse sectional view through the head of the adjusting sleeve on lines 3-3 of Figure 1, and

Figure 4 is a cross-sectional view on lines 4-4 of Figure 1 showing the wrench hold recesses in the internally threaded box member, the casting being shown in plan.

It is common practice in producing oil by conventional pumping equipment to employ a flow tube in the well casing, at the lower end of which is a working barrel, and piston therein, and a standing valve at the bottom of the working barrel. The piston is operated by a string of rod sections called a sucker rod and an upper rod extending through the stufling box called a polish rod.

Under certain conditions the working barrel may become gas logged or sanded, causing the pump to fail in picking up the well fluids, and when such conditions prevail it is desirable to adjust the rod stroke sufficiently to cause the piston in the working barrel to bump the bottom thereof to restore efficient operation. This can be accomplished by the invention.

The invention is concerned with the provision of a device by which the polish rod can be adjusted upwardly or downwardly, thus aifecting the stroke of the piston in the working barrel at the lower end of the flow tube. The polish rod 10 is usually supported by cables 11 through a casting 12, as shown in Figures 1 "'ice and 2, and has a collar (not shown) securable to the rod 10 and supported directly upon the casting 12, and by this arrangement no adjustment between the rod and casting should be accomplished without at least shutting down the pumping equipment resulting in loss of time and effort.

The invention presents a means for making such adjustments quickly and easily while the pump is in operation, and an internally threaded box 13, having a flange 14 formed on its upper end, with peripheral wrench recesses 14 therein, is arranged in the central opening 15 through the casting 12. An externally threaded sleeve 16 is threadedly arranged through the box 13, in the manner shown in Figure 1, and surrounds the polish rod 10. An annular flange 17 is formed about the upper end of the sleeve 16 and has peripheral recesses 18 therein to provide a wrench hold for rotating the same.

The rod 10 is secured by a collar 19 fixed thereto by set screws 20 and this member is seated upon a bearing 21 to permit of certain rotative movements of the rod 10 while being reciprocated. The rod 10 may extend through the sleeve 16, the bearing 21 and the collar 19, as shown in Figures 1 and 2.

The casting 12, a plan view of which is shown in Figure 4, has bores 22 therethrough on each side of the central opening 15 to receive the ends 23 of the cables 11 which are secured in the bores 22 as by leading 24, or other suitable means. The upper ends of the cables 11 are secured to the walking beam 25 of the pump frame 25 and arranged over the arcuate surface of the mulehead 27, as illustrated in Figure 2 which also illustrates the rod 10 operating through a conventional stufiing box 28 and a fluid flow-T 29, the latter having a flow line 30 connected thereto.

Manifestly, the invention is capable of certain changes and modifications from time to time, by persons skilled in the art, without departing from the spirit and intent of the invention or the scope of the appended claim.

What is claimed is:

Means for adjustably suspending the pump rod of a reciprocating well pump from a walking beam actuating the pump whereby the stroke of the pump rod may be adjusted, comprising a casting having a central opening therein surrounding the pump rod, a pair of cables on opposite sides of the pump rod connecting the casting to the walking beam, an internally threaded box surrounding the pump rod and received in the central opening, the box having a flange on its upper end whereby the box is supported on the casting, an externally threaded sleeve surrounding the pump rod and threadedly connected to the box, the sleeve extending through the box and having a flange on its upper end, the flanges of the box and the sleeve each having circumferentially spaced recesses in the periphery thereof for engagement by a wrench, whereby the sleeve may be adjusted longitudinally relative to the box, a collar removably secured to the pump rod above the sleeve, and a bearing surrounding the pump rod and positioned between the sleeve and the collar whereby the collar is rotatably supported on the sleeve and the sleeve is capable of being rotated relative to the pump rod while at the same time supporting the weight thereof.

References Cited in the file of this patent UNITED STATES PATENTS 658,971 Wilt Oct. 2, 1900 1,516,783 OBoyle Nov. 25, 1924 1,639,735 Jones Aug. 23, 1927 1,909,332 Blackburn May 16, 1933 2,142,552 Athy Jan. 3, 1939 2,180,977 Cook -1..- Nov. 21, 1939 2,738,998 Haupt Mar. 20, 1956 

